Calculator
Recipe Scaling Calculator
Scale an ingredient quantity from original servings to desired servings.
Result
Scaling factor
2.5x
Adjusted ingredient quantity
5
How to use this calculator
What this calculator does
Scale an ingredient quantity from original servings to desired servings.
How to use it
Enter your original servings, desired servings, and original ingredient quantity, then review the result, formula, example, and FAQs below. Try a few scenarios to see which inputs move the result most.
What the result means
Use the result as a direct calculation from the values you entered. If it looks off, check the inputs and formula shown on this page.
Browse more food & household calculators for related estimates and comparisons.
Results are estimates for planning and education. Actual costs depend on local prices, household size, diet, waste, brands, discounts, seasonality, storage space, and shopping habits.
Scenario guidance
When to use this
Use this when increasing or reducing a recipe for guests, meal prep, leftovers, or smaller household portions.
Example scenario
A cook has a recipe written for 4 servings and wants to scale one ingredient for a 10-serving family meal.
Inputs that usually matter most
- Original servings, because it is the baseline for the recipe.
- Desired servings, because it sets the new recipe size.
- Original ingredient quantity, because each ingredient needs its own adjusted quantity.
Common mistake to avoid
Do not assume all ingredients scale perfectly; spices, leavening, pan size, cooking time, and texture may need judgment.
How to interpret the result
Use the scaling factor and adjusted quantity as a starting estimate, then adjust for taste, equipment, storage, and recipe-specific behavior.
Results are estimates and are not nutrition, health, legal, financial, or household management advice.
Formula
The scaling factor divides desired servings by original servings. Adjusted quantity multiplies the original ingredient quantity by that factor.
Example recipe scaling
A recipe for 4 servings scaled to 10 servings has a scaling factor of 2.5. An original quantity of 2 units becomes 5 units.
Frequently Asked Questions
Can this scale a full recipe at once?
It scales one ingredient quantity at a time. Repeat the calculation for each ingredient you want to adjust.
What if original servings is zero?
Scaling factor and adjusted quantity are undefined because the calculator cannot divide by zero original servings.
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